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New Evaporator Coils necessary for new Condenser ?
New Evaporator Coils necessary for new Condenser ?
My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
furnace is relatively new.
She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
One HVAC company is saying that they do not install new evaporator coils
because it is unnecessary, and the efficiency will be around 12 or 13 if the
old coils are used with a 15 seer unit. They say they have never had a
problem with leaving the old evaporator coils in.
Another HVAC company is saying that it is important to install new coils
because the efficency won't be good, and also the unit will be under more
stress with the old coils and will likely only last for 4 years.
Which of the two is correct?
Thanks,
J.
My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
furnace is relatively new.
She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
One HVAC company is saying that they do not install new evaporator coils
because it is unnecessary, and the efficiency will be around 12 or 13 if the
old coils are used with a 15 seer unit. They say they have never had a
problem with leaving the old evaporator coils in.
Another HVAC company is saying that it is important to install new coils
because the efficency won't be good, and also the unit will be under more
stress with the old coils and will likely only last for 4 years.
Which of the two is correct?
Thanks,
J.
Re: New Evaporator Coils necessary for new Condenser ?
"jay-n-123@verizon,net " <nospamever@verizon,net > wrote in message
news:RT0Uj.2965$5 1.654@trndny05...
> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> furnace is relatively new.
>
> She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
> One HVAC company is saying that they do not install new evaporator coils
> because it is unnecessary, and the efficiency will be around 12 or 13 if
> the old coils are used with a 15 seer unit. They say they have never had
> a problem with leaving the old evaporator coils in.
>
> Another HVAC company is saying that it is important to install new coils
> because the efficency won't be good, and also the unit will be under more
> stress with the old coils and will likely only last for 4 years.
>
> Which of the two is correct?
>
> Thanks,
>
> J.
Neither of them are correct. The coils *MUST* be replaced when switching to
R-410a(Puron). R-410a and R-22 are not compatable at all, nor are the oils,
and R-410a operates at much higher pressures than R-22....yet another reason
to change the coils. BTW, did you know that the manufacturers will *NOT*
stand behind their warranties if a correctly matched coil is not used with
the new condenser??
I would suggest that you get a properly matched system from and have it
installed by a *COMPETENT*, licensed, insured, professionally trained HVAC
technician. and don't walk, but run away from those two companies. Don't
forget to get that 10 year parts and labor extended warranty with the new
correctly matched system. Also demand a copy of the ARI Certificate of
Performance for the new system. If they can't or won't give you one, then
show them the door.
FWIW, I would not put Carrier in my home on a bet.
http :// www .consumerreports.org/cro/appliances/heating-cooling-and-air/gas-furnaces/furnaces-repair-history-205/overview/
"jay-n-123@verizon,net " <nospamever@verizon,net > wrote in message
news:RT0Uj.2965$5 1.654@trndny05...
> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> furnace is relatively new.
>
> She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
> One HVAC company is saying that they do not install new evaporator coils
> because it is unnecessary, and the efficiency will be around 12 or 13 if
> the old coils are used with a 15 seer unit. They say they have never had
> a problem with leaving the old evaporator coils in.
>
> Another HVAC company is saying that it is important to install new coils
> because the efficency won't be good, and also the unit will be under more
> stress with the old coils and will likely only last for 4 years.
>
> Which of the two is correct?
>
> Thanks,
>
> J.
Neither of them are correct. The coils *MUST* be replaced when switching to
R-410a(Puron). R-410a and R-22 are not compatable at all, nor are the oils,
and R-410a operates at much higher pressures than R-22....yet another reason
to change the coils. BTW, did you know that the manufacturers will *NOT*
stand behind their warranties if a correctly matched coil is not used with
the new condenser??
I would suggest that you get a properly matched system from and have it
installed by a *COMPETENT*, licensed, insured, professionally trained HVAC
technician. and don't walk, but run away from those two companies. Don't
forget to get that 10 year parts and labor extended warranty with the new
correctly matched system. Also demand a copy of the ARI Certificate of
Performance for the new system. If they can't or won't give you one, then
show them the door.
FWIW, I would not put Carrier in my home on a bet.
http :// www .consumerreports.org/cro/appliances/heating-cooling-and-air/gas-furnaces/furnaces-repair-history-205/overview/
Re: New Evaporator Coils necessary for new Condenser ?
>
> I would suggest that you get a properly matched system from and have it
> installed by a *COMPETENT*, licensed, insured, professionally trained HVAC
> technician. and don't walk, but run away from those two companies.
You might still be able to get an R-22 instalation done. We had a
compressor failure a few years ago and our HVAC just replaced the outside
unit for less than $2000. It's only a 5 year guarantee but the man who did
the work is very good and very careful.
If you can't just replace the "outside unit" and/or your HVAC isn't up to
just replacing the compressor you may be stuck with replacing just about
everything but the thermostat and the blower housing.
** Posted from http :// www .teranews,com **
>
> I would suggest that you get a properly matched system from and have it
> installed by a *COMPETENT*, licensed, insured, professionally trained HVAC
> technician. and don't walk, but run away from those two companies.
You might still be able to get an R-22 instalation done. We had a
compressor failure a few years ago and our HVAC just replaced the outside
unit for less than $2000. It's only a 5 year guarantee but the man who did
the work is very good and very careful.
If you can't just replace the "outside unit" and/or your HVAC isn't up to
just replacing the compressor you may be stuck with replacing just about
everything but the thermostat and the blower housing.
** Posted from http :// www .teranews,com **
Re: New Evaporator Coils necessary for new Condenser ?
Just wait till Bubba hears that you're not replacing the thermostat.
OOOHH... I don't want to be here.... oh, yah, maybe I do?
--
Christopher A. Young
Learn more about Jesus
www .lds.org
.
"John Gilmer" <gilmer@crosslink,net > wrote in message
news:d5b67$4820a5f1$17733@news.teranews,com ...
You might still be able to get an R-22 instalation done. We had a
compressor failure a few years ago and our HVAC just replaced the outside
unit for less than $2000. It's only a 5 year guarantee but the man who did
the work is very good and very careful.
If you can't just replace the "outside unit" and/or your HVAC isn't up to
just replacing the compressor you may be stuck with replacing just about
everything but the thermostat and the blower housing.
** Posted from http :// www .teranews,com **
Just wait till Bubba hears that you're not replacing the thermostat.
OOOHH... I don't want to be here.... oh, yah, maybe I do?
--
Christopher A. Young
Learn more about Jesus
www .lds.org
.
"John Gilmer" <gilmer@crosslink,net > wrote in message
news:d5b67$4820a5f1$17733@news.teranews,com ...
You might still be able to get an R-22 instalation done. We had a
compressor failure a few years ago and our HVAC just replaced the outside
unit for less than $2000. It's only a 5 year guarantee but the man who did
the work is very good and very careful.
If you can't just replace the "outside unit" and/or your HVAC isn't up to
just replacing the compressor you may be stuck with replacing just about
everything but the thermostat and the blower housing.
** Posted from http :// www .teranews,com **
Re: New Evaporator Coils necessary for new Condenser ?
> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> furnace is relatively new.
>
> She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
> One HVAC company is saying that they do not install new evaporator coils
> because it is unnecessary, and the efficiency will be around 12 or 13 if
> the old coils are used with a 15 seer unit. They say they have never had
> a problem with leaving the old evaporator coils in.
>
> Another HVAC company is saying that it is important to install new coils
> because the efficency won't be good, and also the unit will be under more
> stress with the old coils and will likely only last for 4 years.
>
> Which of the two is correct?
Would you buy a new Honda and have them put the radiator from your
1986 Oldsmobile in it to save a few bucks? The high efficiency
systems are designed to work as a complete package. Have the coil and
the lines replaced with new.
As another poster already suggested, I would find a contractor that
will do a load calculation to confirm the size unit that is needed and
not just assume that what is there now is correct. She can save quite
a bit on the system and the cost to run it by ensuring that the system
is sized properly.
Steve B.
> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> furnace is relatively new.
>
> She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
> One HVAC company is saying that they do not install new evaporator coils
> because it is unnecessary, and the efficiency will be around 12 or 13 if
> the old coils are used with a 15 seer unit. They say they have never had
> a problem with leaving the old evaporator coils in.
>
> Another HVAC company is saying that it is important to install new coils
> because the efficency won't be good, and also the unit will be under more
> stress with the old coils and will likely only last for 4 years.
>
> Which of the two is correct?
Would you buy a new Honda and have them put the radiator from your
1986 Oldsmobile in it to save a few bucks? The high efficiency
systems are designed to work as a complete package. Have the coil and
the lines replaced with new.
As another poster already suggested, I would find a contractor that
will do a load calculation to confirm the size unit that is needed and
not just assume that what is there now is correct. She can save quite
a bit on the system and the cost to run it by ensuring that the system
is sized properly.
Steve B.
Re: New Evaporator Coils necessary for new Condenser ?
"Noon-Air" <Noon-Air@comcast,net > wrote in message
news:5IGdnZ8xx6crPb3VnZ2dnUVZ_g-dnZ2d@comcast,com ...
> FWIW, I would not put Carrier in my home on a bet.
Carrier... lol
Nuff said...
"Noon-Air" <Noon-Air@comcast,net > wrote in message
news:5IGdnZ8xx6crPb3VnZ2dnUVZ_g-dnZ2d@comcast,com ...
> FWIW, I would not put Carrier in my home on a bet.
Carrier... lol
Nuff said...
Re: New Evaporator Coils necessary for new Condenser ?
"jay-n-123@verizon,net " <nospamever@verizon,net > wrote in message
news:RT0Uj.2965$5_1.654@trndny05...
> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> furnace is relatively new.
>
> She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
> One HVAC company is saying that they do not install new evaporator coils
> because it is unnecessary, and the efficiency will be around 12 or 13 if
the
> old coils are used with a 15 seer unit. They say they have never had a
> problem with leaving the old evaporator coils in.
>
> Another HVAC company is saying that it is important to install new coils
> because the efficency won't be good, and also the unit will be under more
> stress with the old coils and will likely only last for 4 years.
>
> Which of the two is correct?
>
> Thanks,
>
> J.
>
Beside the previous comments, a 22 year old coil is a leak waiting to
happen.
HankG
"jay-n-123@verizon,net " <nospamever@verizon,net > wrote in message
news:RT0Uj.2965$5_1.654@trndny05...
> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> furnace is relatively new.
>
> She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
> One HVAC company is saying that they do not install new evaporator coils
> because it is unnecessary, and the efficiency will be around 12 or 13 if
the
> old coils are used with a 15 seer unit. They say they have never had a
> problem with leaving the old evaporator coils in.
>
> Another HVAC company is saying that it is important to install new coils
> because the efficency won't be good, and also the unit will be under more
> stress with the old coils and will likely only last for 4 years.
>
> Which of the two is correct?
>
> Thanks,
>
> J.
>
Beside the previous comments, a 22 year old coil is a leak waiting to
happen.
HankG
Re: New Evaporator Coils necessary for new Condenser ?
"HankG" <hank@invalid,com > wrote in message
news:KMqdnZ2m3ejsN73VnZ2dnUVZ_oWdnZ2d@comcast,com ...
>
> "jay-n-123@verizon,net " <nospamever@verizon,net > wrote in message
> news:RT0Uj.2965$5_1.654@trndny05...
>> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
>> furnace is relatively new.
>>
>> She wants to replace the old unt with a new Puron Carrier 4 ton
>> condenser.
>>
>> One HVAC company is saying that they do not install new evaporator coils
>> because it is unnecessary, and the efficiency will be around 12 or 13 if
> the
>> old coils are used with a 15 seer unit. They say they have never had a
>> problem with leaving the old evaporator coils in.
>>
>> Another HVAC company is saying that it is important to install new coils
>> because the efficency won't be good, and also the unit will be under more
>> stress with the old coils and will likely only last for 4 years.
>>
>> Which of the two is correct?
>>
>> Thanks,
>>
>> J.
>>
>
> Beside the previous comments, a 22 year old coil is a leak waiting to
> happen.
It's likely to outlast the new coil...
That said... you still have to install a new coil.
"HankG" <hank@invalid,com > wrote in message
news:KMqdnZ2m3ejsN73VnZ2dnUVZ_oWdnZ2d@comcast,com ...
>
> "jay-n-123@verizon,net " <nospamever@verizon,net > wrote in message
> news:RT0Uj.2965$5_1.654@trndny05...
>> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
>> furnace is relatively new.
>>
>> She wants to replace the old unt with a new Puron Carrier 4 ton
>> condenser.
>>
>> One HVAC company is saying that they do not install new evaporator coils
>> because it is unnecessary, and the efficiency will be around 12 or 13 if
> the
>> old coils are used with a 15 seer unit. They say they have never had a
>> problem with leaving the old evaporator coils in.
>>
>> Another HVAC company is saying that it is important to install new coils
>> because the efficency won't be good, and also the unit will be under more
>> stress with the old coils and will likely only last for 4 years.
>>
>> Which of the two is correct?
>>
>> Thanks,
>>
>> J.
>>
>
> Beside the previous comments, a 22 year old coil is a leak waiting to
> happen.
It's likely to outlast the new coil...
That said... you still have to install a new coil.
Re: New Evaporator Coils necessary for new Condenser ?
"KJPRO" <KJPRO @ NEWS . COM> wrote in message
news:5c1f2$4821423c$9440c41e$29395@STARBAND,net ...
>
> "HankG" <hank@invalid,com > wrote in message
> news:KMqdnZ2m3ejsN73VnZ2dnUVZ_oWdnZ2d@comcast,com ...
> >
> > "jay-n-123@verizon,net " <nospamever@verizon,net > wrote in message
> > news:RT0Uj.2965$5_1.654@trndny05...
> >> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> >> furnace is relatively new.
> >>
> >> She wants to replace the old unt with a new Puron Carrier 4 ton
> >> condenser.
> >>
> >> One HVAC company is saying that they do not install new evaporator
coils
> >> because it is unnecessary, and the efficiency will be around 12 or 13
if
> > the
> >> old coils are used with a 15 seer unit. They say they have never had a
> >> problem with leaving the old evaporator coils in.
> >>
> >> Another HVAC company is saying that it is important to install new
coils
> >> because the efficency won't be good, and also the unit will be under
more
> >> stress with the old coils and will likely only last for 4 years.
> >>
> >> Which of the two is correct?
> >>
> >> Thanks,
> >>
> >> J.
> >>
> >
> > Beside the previous comments, a 22 year old coil is a leak waiting to
> > happen.
>
>
> It's likely to outlast the new coil...
> That said... you still have to install a new coil.
>
Bottoms up I guess float the oil out the top with the calgon shit spose take
your time...soak it...$$$=hours
still that old coil is gonna be all stiff an brittle and inadequately rated
as to test and working pressure while any of the new one will be dual
rated--(duh for lower pressure r22) as well as being listed for the higher
pressures you'll encounter w / 410
--
"KJPRO" <KJPRO @ NEWS . COM> wrote in message
news:5c1f2$4821423c$9440c41e$29395@STARBAND,net ...
>
> "HankG" <hank@invalid,com > wrote in message
> news:KMqdnZ2m3ejsN73VnZ2dnUVZ_oWdnZ2d@comcast,com ...
> >
> > "jay-n-123@verizon,net " <nospamever@verizon,net > wrote in message
> > news:RT0Uj.2965$5_1.654@trndny05...
> >> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> >> furnace is relatively new.
> >>
> >> She wants to replace the old unt with a new Puron Carrier 4 ton
> >> condenser.
> >>
> >> One HVAC company is saying that they do not install new evaporator
coils
> >> because it is unnecessary, and the efficiency will be around 12 or 13
if
> > the
> >> old coils are used with a 15 seer unit. They say they have never had a
> >> problem with leaving the old evaporator coils in.
> >>
> >> Another HVAC company is saying that it is important to install new
coils
> >> because the efficency won't be good, and also the unit will be under
more
> >> stress with the old coils and will likely only last for 4 years.
> >>
> >> Which of the two is correct?
> >>
> >> Thanks,
> >>
> >> J.
> >>
> >
> > Beside the previous comments, a 22 year old coil is a leak waiting to
> > happen.
>
>
> It's likely to outlast the new coil...
> That said... you still have to install a new coil.
>
Bottoms up I guess float the oil out the top with the calgon shit spose take
your time...soak it...$$$=hours
still that old coil is gonna be all stiff an brittle and inadequately rated
as to test and working pressure while any of the new one will be dual
rated--(duh for lower pressure r22) as well as being listed for the higher
pressures you'll encounter w / 410
--
Re: New Evaporator Coils necessary for new Condenser ?
On May 6, 12:50 pm, "jay-n-...@verizon,net " <nospame...@verizon,net >
wrote:
> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> furnace is relatively new.
>
> She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
> One HVAC company is saying that they do not install new evaporator coils
> because it is unnecessary, and the efficiency will be around 12 or 13 if the
> old coils are used with a 15 seer unit. They say they have never had a
> problem with leaving the old evaporator coils in.
>
> Another HVAC company is saying that it is important to install new coils
> because the efficency won't be good, and also the unit will be under more
> stress with the old coils and will likely only last for 4 years.
>
> Which of the two is correct?
>
> Thanks,
>
> J.
Even if it did work the seer increase you get from a new coil will
make a major difference in your electric bill, and that you want. Have
you checked how much you will save. do so, charts might be at Carrier.
But one more point in upgrading you may not need 4 ton, but maybe 3
ton,[ im just guessing here] did anybody do a load calculation or
point that out to you. You have 10 seer, probably its 9 seer by now,
its an energy hog, 15 seer is a big saver in electric costs. If it
didnt run nearly constantly on the hottest days, you might have been
oversized before. You need a load calculation in writing.
On May 6, 12:50 pm, "jay-n-...@verizon,net " <nospame...@verizon,net >
wrote:
> My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> furnace is relatively new.
>
> She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
> One HVAC company is saying that they do not install new evaporator coils
> because it is unnecessary, and the efficiency will be around 12 or 13 if the
> old coils are used with a 15 seer unit. They say they have never had a
> problem with leaving the old evaporator coils in.
>
> Another HVAC company is saying that it is important to install new coils
> because the efficency won't be good, and also the unit will be under more
> stress with the old coils and will likely only last for 4 years.
>
> Which of the two is correct?
>
> Thanks,
>
> J.
Even if it did work the seer increase you get from a new coil will
make a major difference in your electric bill, and that you want. Have
you checked how much you will save. do so, charts might be at Carrier.
But one more point in upgrading you may not need 4 ton, but maybe 3
ton,[ im just guessing here] did anybody do a load calculation or
point that out to you. You have 10 seer, probably its 9 seer by now,
its an energy hog, 15 seer is a big saver in electric costs. If it
didnt run nearly constantly on the hottest days, you might have been
oversized before. You need a load calculation in writing.
Re: New Evaporator Coils necessary for new Condenser ?
On May 6, 12:23 pm, ransley <Mark Rans...@yahoo,com > wrote:
> On May 6, 12:50 pm, "jay-n-...@verizon,net " <nospame...@verizon,net >
> wrote:
>
>
>
>
>
> > My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> > furnace is relatively new.
>
> > She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
> > One HVAC company is saying that they do not install new evaporator coils
> > because it is unnecessary, and the efficiency will be around 12 or 13 if the
> > old coils are used with a 15 seer unit. They say they have never had a
> > problem with leaving the old evaporator coils in.
>
> > Another HVAC company is saying that it is important to install new coils
> > because the efficency won't be good, and also the unit will be under more
> > stress with the old coils and will likely only last for 4 years.
>
> > Which of the two is correct?
>
> > Thanks,
>
> > J.
>
> Even if it did work the seer increase you get from a new coil will
> make a major difference in your electric bill, and that you want. Have
> you checked how much you will save. do so, charts might be at Carrier.
> But one more point in upgrading you may not need 4 ton, but maybe 3
> ton,[ im just guessing here] did anybody do a load calculation or
> point that out to you. You have 10 seer, probably its 9 seer by now,
> its an energy hog, 15 seer is a big saver in electric costs. If it
> didnt run nearly constantly on the hottest days, you might have been
> oversized before. You need a load calculation in writing.- Hide quoted text -
>
> - Show quoted text -
A heat load such as manual J is critical to be sure the correct size
unit is installed. One of the items in a J is a blower door test.
This can be critical as one can guess at the ACH (Air Changes per
Hour) but I do not know anyone that can get this GUESS correct every
time. Test do not GUESS. Another test that is critical is the duct
leakage. I’d say 1 of 20 homes we test have duct leakage high enough
our equipment cannot test it. Things such as building cavities used
for ducts, a common practice in many areas of the country during
certain years. So that 15 SEER can be compromised and a larger unit
will be needed. Tight ducts can be more important than a high
efficiency unit.
Be sure dampers are installed in all ducts to balance the unit.
Andy
Think Whole House Performance, it’s the right thing to do…
On May 6, 12:23 pm, ransley <Mark Rans...@yahoo,com > wrote:
> On May 6, 12:50 pm, "jay-n-...@verizon,net " <nospame...@verizon,net >
> wrote:
>
>
>
>
>
> > My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
> > furnace is relatively new.
>
> > She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
> > One HVAC company is saying that they do not install new evaporator coils
> > because it is unnecessary, and the efficiency will be around 12 or 13 if the
> > old coils are used with a 15 seer unit. They say they have never had a
> > problem with leaving the old evaporator coils in.
>
> > Another HVAC company is saying that it is important to install new coils
> > because the efficency won't be good, and also the unit will be under more
> > stress with the old coils and will likely only last for 4 years.
>
> > Which of the two is correct?
>
> > Thanks,
>
> > J.
>
> Even if it did work the seer increase you get from a new coil will
> make a major difference in your electric bill, and that you want. Have
> you checked how much you will save. do so, charts might be at Carrier.
> But one more point in upgrading you may not need 4 ton, but maybe 3
> ton,[ im just guessing here] did anybody do a load calculation or
> point that out to you. You have 10 seer, probably its 9 seer by now,
> its an energy hog, 15 seer is a big saver in electric costs. If it
> didnt run nearly constantly on the hottest days, you might have been
> oversized before. You need a load calculation in writing.- Hide quoted text -
>
> - Show quoted text -
A heat load such as manual J is critical to be sure the correct size
unit is installed. One of the items in a J is a blower door test.
This can be critical as one can guess at the ACH (Air Changes per
Hour) but I do not know anyone that can get this GUESS correct every
time. Test do not GUESS. Another test that is critical is the duct
leakage. I’d say 1 of 20 homes we test have duct leakage high enough
our equipment cannot test it. Things such as building cavities used
for ducts, a common practice in many areas of the country during
certain years. So that 15 SEER can be compromised and a larger unit
will be needed. Tight ducts can be more important than a high
efficiency unit.
Be sure dampers are installed in all ducts to balance the unit.
Andy
Think Whole House Performance, it’s the right thing to do…
Re: New Evaporator Coils necessary for new Condenser ?
I agree with Noon-air. They should put in a high efficiency evap coil,
even if you're staying with R-22 refrigerant. You MUST replace the if
you're moving to R410. If the first company is an authorized dealer
for a name brand company, they could lose their dealership for
recommending a hair brained combination like that.
The second company is correct that you need to install a matching
coil. Most of the high efficiency coils are oversized and then use a
thermostatic expansion valve to squeeze the most efficiency out of
them. However, if that's the way you go, make sure the blower motor
can provide the increased airflow demanded by the oversized coil.
Otherwise you'll get freeze up in humid weather.
Bottom line is you want a matched system.
You also need to change out the line set for the new refrigerant.
On Tue, 06 May 2008 17:50:41 GMT, "jay-n-123@verizon,net "
<nospamever@verizon,net > wrote:
>My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
>furnace is relatively new.
>
>She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
>One HVAC company is saying that they do not install new evaporator coils
>because it is unnecessary, and the efficiency will be around 12 or 13 if the
>old coils are used with a 15 seer unit. They say they have never had a
>problem with leaving the old evaporator coils in.
>
>Another HVAC company is saying that it is important to install new coils
>because the efficency won't be good, and also the unit will be under more
>stress with the old coils and will likely only last for 4 years.
>
>Which of the two is correct?
>
>Thanks,
>
>J.
I agree with Noon-air. They should put in a high efficiency evap coil,
even if you're staying with R-22 refrigerant. You MUST replace the if
you're moving to R410. If the first company is an authorized dealer
for a name brand company, they could lose their dealership for
recommending a hair brained combination like that.
The second company is correct that you need to install a matching
coil. Most of the high efficiency coils are oversized and then use a
thermostatic expansion valve to squeeze the most efficiency out of
them. However, if that's the way you go, make sure the blower motor
can provide the increased airflow demanded by the oversized coil.
Otherwise you'll get freeze up in humid weather.
Bottom line is you want a matched system.
You also need to change out the line set for the new refrigerant.
On Tue, 06 May 2008 17:50:41 GMT, "jay-n-123@verizon,net "
<nospamever@verizon,net > wrote:
>My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
>furnace is relatively new.
>
>She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
>One HVAC company is saying that they do not install new evaporator coils
>because it is unnecessary, and the efficiency will be around 12 or 13 if the
>old coils are used with a 15 seer unit. They say they have never had a
>problem with leaving the old evaporator coils in.
>
>Another HVAC company is saying that it is important to install new coils
>because the efficency won't be good, and also the unit will be under more
>stress with the old coils and will likely only last for 4 years.
>
>Which of the two is correct?
>
>Thanks,
>
>J.
Re: New Evaporator Coils necessary for new Condenser ?
Sounds like you have some really interesting HVAC techs, there. Mix Puron
and R-22? Not a good idea. If it works at all, it won't work for long.
--
Christopher A. Young
Learn more about Jesus
www .lds.org
.
"jay-n-123@verizon,net " <nospamever@verizon,net > wrote in message
news:RT0Uj.2965$5_1.654@trndny05...
My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
furnace is relatively new.
She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
One HVAC company is saying that they do not install new evaporator coils
because it is unnecessary, and the efficiency will be around 12 or 13 if the
old coils are used with a 15 seer unit. They say they have never had a
problem with leaving the old evaporator coils in.
Another HVAC company is saying that it is important to install new coils
because the efficency won't be good, and also the unit will be under more
stress with the old coils and will likely only last for 4 years.
Which of the two is correct?
Thanks,
J.
Sounds like you have some really interesting HVAC techs, there. Mix Puron
and R-22? Not a good idea. If it works at all, it won't work for long.
--
Christopher A. Young
Learn more about Jesus
www .lds.org
.
"jay-n-123@verizon,net " <nospamever@verizon,net > wrote in message
news:RT0Uj.2965$5_1.654@trndny05...
My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
furnace is relatively new.
She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
One HVAC company is saying that they do not install new evaporator coils
because it is unnecessary, and the efficiency will be around 12 or 13 if the
old coils are used with a 15 seer unit. They say they have never had a
problem with leaving the old evaporator coils in.
Another HVAC company is saying that it is important to install new coils
because the efficency won't be good, and also the unit will be under more
stress with the old coils and will likely only last for 4 years.
Which of the two is correct?
Thanks,
J.
Re: New Evaporator Coils necessary for new Condenser ?
"Stormin Mormon" <cayoung61**spamblock##@hotmail,com > wrote in message
news:4820f15f$0$31744$4c368faf@roadrunner,com ...
> Sounds like you have some really interesting HVAC techs, there. Mix Puron
> and R-22? Not a good idea. If it works at all, it won't work for long.
Are you visiting the area Stormy???
Sounds like something you'd do...
"Stormin Mormon" <cayoung61**spamblock##@hotmail,com > wrote in message
news:4820f15f$0$31744$4c368faf@roadrunner,com ...
> Sounds like you have some really interesting HVAC techs, there. Mix Puron
> and R-22? Not a good idea. If it works at all, it won't work for long.
Are you visiting the area Stormy???
Sounds like something you'd do...
Re: New Evaporator Coils necessary for new Condenser ?
On Tue, 06 May 2008 17:50:41 GMT, "jay-n-123@verizon,net "
<nospamever@verizon,net > wrote:
>My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
>furnace is relatively new.
>
>She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
>One HVAC company is saying that they do not install new evaporator coils
>because it is unnecessary, and the efficiency will be around 12 or 13 if the
>old coils are used with a 15 seer unit. They say they have never had a
>problem with leaving the old evaporator coils in.
>
>Another HVAC company is saying that it is important to install new coils
>because the efficency won't be good, and also the unit will be under more
>stress with the old coils and will likely only last for 4 years.
>
>Which of the two is correct?
>
>Thanks,
>
>J.
J, all bull shiting aside, the facts of the matter are that if you are
switching from 22 to 410a you should replace the evaporator, line set
and condenser at the same time.
Youll hear a hundred different people say a hundred different things
and the technical reasons can be argued ad nauseum but it isnt going
to change the that basic truth.
The thumbnail version of the reasons are that the oils that the two
refrigerants use are not compatible with each other, and the
evaporator will not have anywhere close to the right efficiency and
the actual running pressures and temperatures will not be optimum for
the system and will most probably shorten the system life.
Its your money and you can do what you want, and like it or not, thats
the facts, Jack.
On Tue, 06 May 2008 17:50:41 GMT, "jay-n-123@verizon,net "
<nospamever@verizon,net > wrote:
>My mom's 22 year old 4 Ton 10-seer Carrier A/C condenser is shot. Her
>furnace is relatively new.
>
>She wants to replace the old unt with a new Puron Carrier 4 ton condenser.
>
>One HVAC company is saying that they do not install new evaporator coils
>because it is unnecessary, and the efficiency will be around 12 or 13 if the
>old coils are used with a 15 seer unit. They say they have never had a
>problem with leaving the old evaporator coils in.
>
>Another HVAC company is saying that it is important to install new coils
>because the efficency won't be good, and also the unit will be under more
>stress with the old coils and will likely only last for 4 years.
>
>Which of the two is correct?
>
>Thanks,
>
>J.
J, all bull shiting aside, the facts of the matter are that if you are
switching from 22 to 410a you should replace the evaporator, line set
and condenser at the same time.
Youll hear a hundred different people say a hundred different things
and the technical reasons can be argued ad nauseum but it isnt going
to change the that basic truth.
The thumbnail version of the reasons are that the oils that the two
refrigerants use are not compatible with each other, and the
evaporator will not have anywhere close to the right efficiency and
the actual running pressures and temperatures will not be optimum for
the system and will most probably shorten the system life.
Its your money and you can do what you want, and like it or not, thats
the facts, Jack.
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